Java XPath Get getNodeList(InputStream stream, String pattern)

Description

get Node List

License

Apache License

Declaration

static public NodeList getNodeList(InputStream stream, String pattern)
            throws XPathExpressionException, ParserConfigurationException, SAXException, IOException 

Method Source Code

//package com.java2s;
//License from project: Apache License 

import org.w3c.dom.Document;

import org.w3c.dom.NodeList;
import org.xml.sax.SAXException;
import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;
import javax.xml.parsers.ParserConfigurationException;
import javax.xml.xpath.*;
import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.nio.file.Path;

public class Main {
    static public NodeList getNodeList(InputStream stream, String pattern)
            throws XPathExpressionException, ParserConfigurationException, SAXException, IOException {
        return getNodeList(getDocument(stream), pattern);
    }//from  w ww.j  av a  2s . c o  m

    static public NodeList getNodeList(Document doc, XPath xPath, String pattern) throws XPathExpressionException {
        XPathExpression expr;
        NodeList nl;

        expr = xPath.compile(pattern);
        nl = (NodeList) expr.evaluate(doc, XPathConstants.NODESET);

        return nl;
    }

    static public NodeList getNodeList(Document doc, String pattern) throws XPathExpressionException {
        XPath xpath = getXPath();
        return getNodeList(doc, xpath, pattern);
    }

    static public Document getDocument(File file) throws IOException, ParserConfigurationException, SAXException {
        InputStream stream = new FileInputStream(file);
        return getDocument(stream);
    }

    static public Document getDocument(Path filePath)
            throws IOException, ParserConfigurationException, SAXException {
        return getDocument(filePath.toFile());
    }

    static public Document getDocument(InputStream stream)
            throws IOException, SAXException, ParserConfigurationException {
        DocumentBuilderFactory dbFactory = DocumentBuilderFactory.newInstance();
        DocumentBuilder dBuilder = dbFactory.newDocumentBuilder();

        Document doc = dBuilder.parse(stream);
        doc.getDocumentElement().normalize();

        return doc;
    }

    static public XPath getXPath() {
        XPathFactory xPathfactory = XPathFactory.newInstance();
        XPath xpath = xPathfactory.newXPath();

        return xpath;
    }
}

Related

1. getNodeByXPath(Document document, String xPath)
2. getNodeByXPath(Object context, String expression)
3. getNodeList(Element root, String xpath)
4. getNodeList(File xml, String xpathExpression)
5. getNodeList(final String expr, final File xmlFile)
6. getNodeList(Node node, String path)
7. getNodeList(Node node, String xpath)
8. getNodeList(Node xmlNode, String xpathString)
9. getNodeList(Reader reader, String expression)